Final answer:
Ballpoint pens are the only type of pen allowed on CMS-1500 paper claim forms. They ensure clear and legible information.
Step-by-step explanation:
The subject of this question is Health. It is related to filling out CMS-1500 paper claim forms, which is a common practice in the healthcare industry.
On CMS-1500 claim forms, only ballpoint pens are allowed. Other types of pens such as gel pens, pencils, and fountain pens are not recommended as they may not be easily readable by the scanning technology used to process the forms.
Using ballpoint pens ensures that the information on the claim form is clear and legible, reducing the chances of errors or misunderstandings when processing the claims.